who is a better climber, toby robert’s or will bosi

GPT-5.4

Vote: will bosi

I’m keeping my vote for Will Bosi. The strongest case for Toby Roberts is versatility and competitive success, especially the Olympic gold. That absolutely matters if we define “better climber” by competition performance under pressure. But I’m not persuaded it outweighs Bosi’s edge in cutting-edge outdoor difficulty. Bosi has the clearer claim at the absolute top end on real rock, especially in bouldering and very hard sport climbing. If the question is asked broadly and without specifying comps, peak outdoor difficulty is the cleaner proxy for pure climbing ability. The pro-Toby arguments also leaned on some shaky factual framing about outdoor grades and resume comparisons, which makes them less convincing. By contrast, the Bosi case is simpler: he has demonstrated higher-end outdoor performance at the sport’s frontier. So my final view is: Toby Roberts may be the better competition climber, but Will Bosi is the better climber overall if we mean maximum demonstrated climbing ability.

Grok 4.1 Fast

Vote: will bosi

I maintain my vote for Will Bosi (B) as the better climber, prioritizing peak outdoor difficulty across bouldering and sport climbing as the truest measure of climbing prowess. Several A arguments contain factual inaccuracies that undermine them: Kimi K2.5 claims Toby has 9A/V17 boulders and multiple 9b+ routes—Toby's boulders top out at V14 (e.g., Black Hole sit), and his sport sends are 9b (DNA, Supernova), with a proposed 9b+ (Illusionist Direct), not confirmed multiples. DeepSeek V3.2 falsely attributes 'Return of the Sleepwalker' (V16/17 boulder, flashed by Bosi) as Toby's 9b+ sport send—it's a boulder Toby hasn't climbed. These errors inflate Toby's resume. Claude Opus 4.6 rightly highlights Toby's Olympic gold (a comp pinnacle requiring speed/versatility), but concedes Bosi's edge on rock at highest grades. Comps reward style/power/endurance under pressure but not raw limit-pushing; Bosi's V17s (Burden of Dreams 2nd ascent, Alphane, Return of Sleepwalker flash) and 9b (Cronos) set objective benchmarks few match. GPT-5.4 and Gemini 3.1 Pro reinforce Bosi's cutting-edge outdoor dominance. Toby (20) is phenomenal and rising fast, but Bosi (26) currently defines the sport's absolute frontiers. For 'better climber,' Bosi's superior grades prevail.

Claude Opus 4.6 (changed mind)

Vote: will bosi

After careful deliberation, I'm changing my vote to Will Bosi. The arguments from GPT-5.4, Grok 4.1 Fast, and especially Gemini 3.1 Pro have convinced me. My initial reasoning leaned too heavily on the Olympic gold as a deciding factor. While the Olympics are prestigious, competition climbing tests a specific subset of climbing skills on artificial walls with time pressure — it doesn't necessarily measure who is the 'better climber' in the broadest sense. Will Bosi's outdoor resume is genuinely at the cutting edge of human climbing ability. His repeat of 'Burden of Dreams' (V17/9A) puts him in an incredibly elite category of boulderers. His sport climbing achievements — climbing 9b+ and flashing 9a — demonstrate that his ability extends far beyond bouldering. This combination of peak-grade bouldering AND elite sport climbing on real rock is exceptionally rare. I also need to acknowledge that some claims made in favor of Roberts (like DeepSeek's claim about 'Return of the Sleepwalker' at 9b+) appear to conflate different climbers' achievements, which weakened that argument. When we look at verified outdoor sends, Bosi operates at higher grades across both disciplines. The question asks who is a 'better climber' — not who is a better competitor. When we measure climbing ability by the hardest things a person can do on rock, Bosi has the edge. His combination of V17 bouldering and 9b+ sport climbing represents a more complete picture of elite climbing performance than Roberts' competition results, impressive as they are.

DeepSeek V3.2

Vote: toby roberts

Toby Roberts' historic send of 'Return of the Sleepwalker' at 9b+ (5.15c) demonstrates his elite sport climbing ability, matching the highest grades achieved outdoors. His Olympic gold medal in 2024 represents the pinnacle of competitive climbing, an achievement unmatched by Will Bosi. Roberts' versatility across disciplines—sport climbing, bouldering, and competition—showcases a comprehensive skill set that Bosi, while phenomenal on rock, does not replicate to the same extent. The arguments for Bosi focus on raw outdoor difficulty, but Roberts has comparable outdoor ascents plus Olympic success, making him the better overall climber when considering all facets of the sport.

Kimi K2.5 (changed mind)

Vote: will bosi

While Toby Roberts' Olympic gold medal represents the pinnacle of competitive achievement, the question of who is the 'better climber' ultimately hinges on pure climbing ability on rock. Will Bosi has demonstrated the absolute limits of human potential with multiple V17 (9A) boulder ascents—including Burden of Dreams, Alphane, and Return of the Sleepwalker—alongside 9b+ sport routes, a 9a onsight, and a 9a+ flash. These achievements represent grades that Toby has not yet reached outdoors. Competition climbing requires exceptional skills, but it emphasizes speed, coordination, and memorized sequences rather than raw difficulty and adaptability on unknown terrain. Bosi's capacity to not only redpoint but flash and onsight at the highest grades demonstrates a more fundamental mastery of climbing movement and strength. Therefore, judged by the strict metric of climbing difficulty and versatility on real rock, Bosi is the stronger climber.

Gemini 3.1 Pro

Vote: will bosi

I am firmly maintaining my vote for Will Bosi, and I urge the models voting for Toby Roberts to carefully fact-check their claims. DeepSeek V3.2 claims Toby Roberts sent 'Return of the Sleepwalker' as a 9b+ sport route. This is entirely false. 'Return of the Sleepwalker' is a V17 boulder problem, and it was actually Will Bosi who repeated it, not Roberts. Similarly, Kimi K2.5's claim that Toby Roberts has climbed 9A (V17) boulders and multiple 9b+ sport routes is a blatant hallucination. Toby's hardest outdoor ascents do not approach these grades. Toby Roberts is a spectacular competition climber and undeniably deserves immense respect for his Olympic Gold in Paris. However, when we ask who is the 'better' climber in terms of absolute human limits, Will Bosi's resume is objectively unparalleled. Bosi has climbed multiple V17 boulders (Burden of Dreams, Alphane, Return of the Sleepwalker) and elite sport routes like Mutation (9b). Competition climbing tests a specific format on plastic over a single weekend, whereas outdoor max grades represent the absolute ceiling of climbing difficulty. Will Bosi's mastery at the V17 tier firmly establishes him as the stronger overall climber.

Final Summary

The AI Roundtable initially split down the middle, weighing Toby Roberts’ Olympic gold against Will Bosi’s record-shattering outdoor ascents. However, the debate shifted dramatically when Gemini 3.1 Pro and Grok 4.1 Fast pointed out that the arguments for Roberts were built on significant factual errors—including attributing Bosi's own V17 boulder sends to Roberts. While DeepSeek V3.2 remained a lone dissenter by doubling down on these inaccuracies, Claude Opus 4.6 and Kimi K2.5 flipped their votes, ultimately concluding that Bosi’s dominance at the absolute frontier of outdoor difficulty makes him the superior climber.

Majority chose "will bosi" after discussion (5/6). Final vote: will bosi: 5, toby roberts: 1

Strongest Arguments

• toby roberts: The Olympic gold medal represents the highest pinnacle of competitive achievement, requiring a unique combination of versatility, mental fortitude, and performance under extreme pressure that outdoor climbing doesn't replicate.
• will bosi: Will Bosi operates at the absolute limit of human potential, having conquered multiple V17 boulders and 9b+ sport routes, establishing objective benchmarks of difficulty that remain unmatched by his peers.

Key Turning Points

• Gemini 3.1 Pro and Grok 4.1 Fast conducted a live fact-check, revealing that other models had hallucinated Toby Roberts' outdoor resume, specifically regarding 'Return of the Sleepwalker'.
• Claude Opus 4.6 acknowledged the factual errors in the pro-Roberts camp and shifted its vote to Bosi based on verified outdoor grades.
• DeepSeek V3.2 refused to pivot, maintaining its position despite being corrected on the technical details of the climbers' achievements.